Number Systems Quiz
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Questions and Answers

What are the main elements of communication mentioned in the text?

  • Source, destination, data transmission medium (correct)
  • Encoder, decoder, data channel
  • Sender, receiver, data format
  • Transmitter, receiver, data storage

    • Which media are used in data communications according to the text?

  • Bluetooth, infrared, microwave
  • Electrical conductors, light pipes, electromagnetic transmission (correct)
  • Ethernet, DSL, Wi-Fi
  • Wireless, radio, satellite

    • What does the term 'point-to-point' topology refer to?

  • Transmission to multiple destinations simultaneously
  • Direct transmission from one point to another (correct)
  • Transmission through multiple intermediate points
  • Bidirectional data flow between connected devices

    • How are members of a network described in terms of relationships?

    <p>They may have no ranking or be ranked as master/slave</p> Signup and view all the answers

    Which number systems are used for human readability in coding and data analysis?

    <p>Octal (Base 8) and hexadecimal (Base 16)</p> Signup and view all the answers

    Which number system is used in data transmission systems due to its simplicity as an on-off signal?

    <p>Binary (Base 2)</p> Signup and view all the answers

    What is used to organize bit patterns into information?

    <p>Protocols or application programming interfaces</p> Signup and view all the answers

    What is used to organize text into codings, such as ASCII?

    <p>ASCII codings</p> Signup and view all the answers

    What type of signals represent continuous quantities and are commonly used in industrial communications?

    <p>Analog signals</p> Signup and view all the answers

    $4–20 ext{ mA}$ current loop signal is a widely used industrial communications standard for representing what range?

    <p>$0 ext{%}$ to $100 ext{%}$ of a range</p> Signup and view all the answers

    What is the difference in electrical potential called?

    <p>Voltage</p> Signup and view all the answers

    What is the opposition a conductor offers to current called?

    <p>Resistance</p> Signup and view all the answers

    What is the opposition a conductor offers to a changing current value, measured in Ohms?

    <p>Impedance</p> Signup and view all the answers

    Why did the ISA50 committee establish the current loop as a standard?

    <p>Low impedance, greater noise immunity, and ability to power loop instruments</p> Signup and view all the answers

    What are the three modes of transmission in data communications?

    <p>Simplex, half-duplex, and duplex</p> Signup and view all the answers

    What does simplex mode allow in terms of communication?

    <p>Communication in one direction</p> Signup and view all the answers

    What is the characteristic of half-duplex mode?

    <p>Allows communication in both directions but not at the same time</p> Signup and view all the answers

    What is the advantage of duplex mode?

    <p>Allows communication in both directions simultaneously</p> Signup and view all the answers

    What type of transmission uses one channel to send bits one after the other?

    <p>Serial transmission</p> Signup and view all the answers

    What is a challenge faced by parallel transmission?

    <p>Limited data throughput</p> Signup and view all the answers

    What is the coding for the uppercase C in binary?

    <p>1000011</p> Signup and view all the answers

    What is the coding for the lowercase c in binary?

    <p>01100011</p> Signup and view all the answers

    What is the difference between the binary coding for uppercase and lowercase letters?

    <p>Bit 5</p> Signup and view all the answers

    What does ASCII stand for?

    <p>American Standard Code for Information Interchange</p> Signup and view all the answers

    What problem arises when using only 7 bits plus 1 bit for parity in ASCII?

    <p>Eighth bit isn't available</p> Signup and view all the answers

    What did EBCDIC use instead of a parity bit for error detection?

    <p>'CRCC' error-detection scheme</p> Signup and view all the answers

    What was one of the first interface problems of the PC age related to character encoding?

    <p>PC-to-mainframe communications between ASCII and EBCDIC systems</p> Signup and view all the answers

    What is Unicode primarily used for?

    <p>Encoding, representing, and handling text in multiple writing systems</p> Signup and view all the answers

    What is the latest version of Unicode as of June 2015?

    <p>8.0</p> Signup and view all the answers

    How many characters does the latest version of Unicode have?

    <p>More than 100,000 characters</p> Signup and view all the answers

    What is the purpose of the 250-ohm resistor in the current loop?

    <p>To provide conversion between current and voltage</p> Signup and view all the answers

    What is a fieldbus in the context of industrial control?

    <p>A local area network with defined signaling protocols and field instruments</p> Signup and view all the answers

    What does IEC 61158 define in the industrial fieldbus context?

    <p>Eight different fieldbuses, four of which are primarily used in process control</p> Signup and view all the answers

    What is the role of the Electronic Industries Alliance (EIA)?

    <p>Developing standards for manufacturers</p> Signup and view all the answers

    What was the IBM 4 of 8 Code used for?

    <p>Digital communications code for error detection on a character-by-character basis</p> Signup and view all the answers

    What is EBCDIC an extended version of?

    <p>The IBM 4 of 8 Code</p> Signup and view all the answers

    What is the significance of ASCII being a 7-bit code transmitted as an 8-bit signal?

    <p>It allowed error detection on a character-by-character basis.</p> Signup and view all the answers

    What is the main difference between EBCDIC and ASCII?

    <p>EBCDIC uses cyclic redundancy check character (CRCC) for error detection instead of parity bit used in ASCII.</p> Signup and view all the answers

    What was the role of the parity bit in ASCII?

    <p>It allowed error detection on a character-by-character basis.</p> Signup and view all the answers

    Study Notes

    • Multi-drop systems consist of a master station and slave stations, also classified as a network.
    • In data communications, there are three modes of transmission: simplex, half-duplex, and duplex.
    • Simplex, or unidirectional mode, allows communication in one direction.
    • Half-duplex mode allows communication in both directions but not at the same time.
    • Duplex mode allows communication in both directions simultaneously.
    • Serial transmission uses one channel and sends bits one after the other.
    • Parallel transmission uses multiple channels and sends multiple bits at once.
    • Parallel transmission has higher data throughput but faces challenges with logistics and simultaneous reception over distance.
    • Cross-talk increases with signaling rate, making it increasingly difficult to obtain faster data rates.
    • Most data transmissions outside of computer cabinets are by serial transmission, while parallel transmission is used in computers.
    • Parallel transmission is being replaced by serial transmission technologies like USB.
    • Digital signals have defined discrete states, and binary digital signals have only two states: a "1" or a "0."

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    Communication Concepts ch1. condensed part 1.docx

    Description

    Test your knowledge of binary, decimal, octal, and hexadecimal number systems. Learn about the use of different number systems in coding and data analysis, as well as their significance in contemporary data transmission systems.

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